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Arcing Flyback Transformer - HELP

Discussion in 'Electronic Repair' started by Paul Richards, Oct 26, 2003.

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  1. Hi,

    I have a 1994 Atari Primal Rage Cabinet. The flyback is arcing in all directions
    - mostly across a 3cm gap to
    the earched chassis but is also arcing to a nearby component on the pcb.

    I presume I need a new flyback? Any other components likely to be damaged?

    Model of flyback is 2027017-001

    Any advice appreciated (guess I may need to buy the new part and then hire
    in a professional to do the
    soldering etc?)

    I can send a 65k .jpg picture of the arcing to anyone interested!

    Paul
     
  2. Sounds like you may have an excessive high voltage problem as well.
    a 3 cm arc is roughly 30 kV.

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  3. I've run into that problem with the some series of video game
    monitors. What I do is chop away at the offending metal frame so that
    it is at least 2 inches away from the burn-though spot on the flyback.

    If the burn-through is near the Focus/Screen pots on the flyback then
    you can use epoxy to fill the hole, after scraping it carefully to
    remove any burnt material (conductive!).

    Doesn't always work, but I have saved a couple of monitors this way.

    John :-#)#

    (Please post followups or tech enquires to the newsgroup)
    John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
     
  4. Why not just replace the flyback? Seems like the "offending" component is
    not the metal frame, which may be providing some shielding or a safer place
    to ground any of those "offensive" arcs.

    Leonard Caillouet
     
  5. Actually we used to do just that, and the flyback would AGAIN burn
    through. Turns out the design of the flyback was poor - the insulation
    too thin and the metal that it would arc over to had a nice sharp edge
    close to the weak spot.

    Since we now cut away the metal we have had no further flyback
    failures.

    John :-#)#

    (Please post followups or tech enquires to the newsgroup)
    John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
     
  6. James Sweet

    James Sweet Guest

    When I run into something like that I usually put a blob of clear silicone
    caulk over the offending metal and the burn spot on the flyback as well if
    it's still salvageable, so far so good.
     
  7. kc8adu

    kc8adu Guest

    that is a wells gardiner part and they are common to see arcing.iirc it is
    replaced by hr7717.
    mcm has it.
     
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